Date of Award
2023-12-01
Degree Name
Master of Science
Department
Metallurgical and Materials Engineering
Advisor(s)
Shailendra K. Varma
Abstract
The effect of Ag on the microstructure developed in Al-Cu-Ni-Mn alloy has been determined. The modified Al-Cu-Ni-Mn alloy by Ag addition shows the presence of three microconstituents consisting of phases rich in (1) Cu, (2) Ni, and (3) Ag. The foregoing alloys heated for 24 hours from 600 to 1000 °C show excellent oxidation resistance. Oxide formation and microstructural changes of the alloy have been characterized by elemental mapping and X-ray diffraction (XRD). Results show that the elements of Al and Mn preferentially oxidize while Cu and Ni provide oxidation resistance to the alloy. Hardness was taken on the alloy and its microconstituents before and after oxidation. In the as-received condition, the microconstituent with the highest hardness is Ag-rich (429 HV), and the lowest with Cu-rich (392 V). After oxidation at 1000 °C, Ni-rich has the highest (447 HV) and Ag-rich the lowest (112 HV) hardness. Grain size measurement was performed to observe the change and amount of the microconstituents. Hardness and grain size measurements have been taken to make a Hall-Petch relationship.
Language
en
Provenance
Recieved from ProQuest
Copyright Date
2023-12
File Size
57 p.
File Format
application/pdf
Rights Holder
Gina Zavala Alvarado
Recommended Citation
Zavala Alvarado, Gina, "Characterization of FCC Al-Cu-Ni-Mn-Ag High Entropy Alloy" (2023). Open Access Theses & Dissertations. 4033.
https://scholarworks.utep.edu/open_etd/4033